# A tibble: 6 x 5
     gx    gy meanelev convex slope
  <dbl> <dbl>    <dbl>  <dbl> <dbl>
1     0     0     365. -0.390  8.87
2     0    20     365. -0.285 13.7 
3     0    40     367.  0.210 14.4 
4     0    60     367.  0.34  15.9 
5     0    80     362. -0.255 20.8 
6     0   100     358. -0.510 12.4 
